1. Section of Vascular Investigations, Oslo University Hospital, Aker, Oslo, Norway and Bjorknes College, Oslo
2. Department of Medicine, Diakonhjemmet Hospital, Oslo, Norway
3. Oslo Sports Trauma Research Center, Oslo, Norway and Norwegian School of Sports Sciences, Oslo, Norway
4. Department of Cardiology, Oslo University Hospital, Aker, Oslo, Norway
5. Department of Cardiology, Lorenskog, Akershus University Hospital, Norway